From 1914 ministered in the Rudnyky parish. In 1939, the parish village — on the Rybnytsya River, a right tributary of the Prut, in the historic land of Pokuttia, in the south of Red Ruthenia — was inhabited by c. 1,900 people, of whom c. 80% were Greek Catholic Ukrainians and c. 18% Roman Catholic Poles. In addition, c. 30 Jews lived in the village. The village was also the seat of the manor/palace of the Moysa‐Rosochacki family, of Armenian origin.

After the German and Russian attack on Poland in 09.1939 and the start of World War II, Rudnyky was occupied by the Russians on c. 18‐20.09.1939 — in accordance with the genocidal agreement between the two allies, known as the Molotov–Ribbentrop Pact of 23.08.1939, later confirmed by the so‐called „Treaty on the Frontiers and Friendship between Germany and Russia” of 28.09.1939, also known as the Second Molotov–Ribbentrop Pact. The Russian occupation began.

During the Russian occupation, Poles experienced, like the inhabitants of other villages and towns, Russian persecution. Already in the autumn of 1939, the Russians plundered the Moysa‐Rosochacki manor, evicting the family from the village (the owner, Michael Moysa‐Rosochacki, was later arrested by the Russians and murdered in the Brygidki or Zamarstyniv prison in Lviv, just before or perhaps during the genocide in Russian prisons in 06.1941). The next step was the Sovietization of schools, which meant, for example, the removal of religious education. Immediately afterwards, mass arrests of Poles began. In four large deportations deep into Russia, „to Siberia”, the Russians deported between 340,000 and 1,000,000 Polish citizens, entire families, „especially those who held significant positions”, i.e. teachers, officers and military settlers, political activists, estate owners, businessmen, officials, and other wealthy individuals, considered by the Russians to be a „hostile and harmful element”. And so, in the first of them, on c. 10.02.1940, in the middle of a particularly frosty winter, according to data from the Convoy Forces of the genocidal NKVD, c. 88,385 people were deported from „Western Ukraine”, including from Pokuttia, where ministered. Practically, none of them ever returned to their homeland.

It is not known whether, and how many, Poles were deported from his parish.

On Rudnyky ministered also on 22.06.1941, when the Germans attacked their erstwhile ally, the Russians. To his village first, prob. at the beginning of 07.1941, Romanian troops collaborating with the Germans entered, soon to be replaced by Hungarian military units. The Germans took control at the beginning of 08.1941.

Rudnyky found itself in the Germ. Kreishauptmannschaft Kolomea (Eng. Kolomyia County), within the Germ. Distrikt Galizien (Eng. District of Galicia), part of the German‐occupied and run quasi‐state called the Germ. Generalgouvernement (Eng. General Governorate), i.e. GG. The persecution of Jews began immediately. In the Germ. Kreishauptmannschaft Kolomea, in the vicinity of his village, the Germans organized two ghettos — in Kolomyia and a much smaller one in Sniatyn (the two other were a bit further away). From both of them most of the Jews were deported — after the start of the genocidal plan Germ. «Endlösung der Judenfrage» (Eng. Final Solution of the Jewish Question), i.e. extermination of the Jewish community, in the GG called by the German codename Germ. «Aktion Reinhardt» (Eng. Operation Reinhardt) — to the Germ. Vernichtungslager (Eng. Extermination Camp) VL Belzec, where they were all murdered. Some were murdered in the ghettos themselves — those hiding, while being herded to railway wagons, etc. Jews from Rudnyky prob. were first driven to Zabolotiv, c. 7 km away, near the railway line connecting Kolomyia with Sniatyn and then Chernivtsi. Jewish sources are not precise here — on the one hand, they state that on 07.09.1942, c. 250 people were transported from Zabolotiv to Sniatyn, and then on 10.09.1942, the Jews were transported from Sniatyn in 10 „cattle wagons” to VL Belzec; on the other hand, they state that between 07‐11.09.1939, c. 17,300 Jews were deported from Kolomyia and the surrounding area, including Zabolotiv. It is most probable that the Jews from Zabolotiv were first transported to Sniatyn, from there to Kolomyia — via Zabolotiv — where the wagons were connected to a larger transport, and from there to VL Belzec. In both Germ. Aktion (Eng. Operation), an active role was played by collaborative Ukrainian police units of Germ. Ukrainische Hilfspolizei (Eng. Ukrainian Auxiliary Police), in some regions also operating as Germ. Schutzmannschaft (Eng. Security Battalions), i.e. Schuma.

Immediately afterwards, in 02.1943, c. 250 km to the north, in Volyn, Roman Shukhevych, nom de guerre „Taras Chuprynka”, the chief commander of the Ukrainian, genocidal OUN/UPA organisation, who in 1941 was a member of the Ukrainian Germ. Sondergruppe Nachtigall (Eng. Special Group Nightingale) — a unit of the Germ. Wehrmacht (Eng. Armed Forces) that took part in the German attack on Russians in 1941, accused of participating in the Jewish pogrom in Lviv in 1941 — and later a member of the Germ. Schutzmannschaftsbataillon 201 (Eng. 201st Protection team Battalion) — responsible for the murder of Jews and civilians in the territory of Belarus — issued an order: „The extermination operation should be carried out according to the following principles: Polish villages are to be burned, and their populations massacred. Attacks on towns will take place in broad daylight, not at night. In mixed villages, the Polish population alone should be liquidated, and farmsteads should be burned only if they are 15 meters away and when there is no risk of the fire spreading to neighboring Ukrainian buildings. The Ukrainian population will receive instructions as to where to gather during the attack […] For every Ukrainian murdered, whether by Poles or Germans, 100 (one hundred) Poles will be executed”.

It was the de facto signal for the commencement of the «Genocidium Atrox» — i.e. the genocide perpetrated by Ukrainians, known as „Volyn genocide”.

Immediately thereafter, in 03.1943, the UPA issued an appeal to members of the Germ. Ukrainische Hilfspolizei to desert and join the UPA ranks. Perhaps as many as 10,000 Ukrainians did so.

Volyn was drenched in Polish blood. Tens of thousands of Poles were murdered by the Ukrainians — with German passivity — in an extremely barbaric manner. Hundreds of villages were burned.

Shukhevych's appeal was not formally addressed to the units of the Germ. Ukrainische Hilfspolizei in the Germ. Distrikt Galizien — because there in 1943 the genocidal OUN did not establish an armed wing under the name of UPA, but formed armed units under a euphemistic name, to „confuse” the Germans, Ukr. Українська Народна Самооборона (Eng. Ukrainian National Self‐Defense), i.e. UNS — but de facto also there the Ukrainian génocidaires, „unemployed” after the end of the Germ. «Aktion Reinhardt», deserted and joined the UNS. Their main goal, like the OUN/UPA, was the extermination of the Polish population, although its internal documentation and reports ostentatiously stated „defense against the terror of the German authorities”.

Shukhevych entrusted the position of UNS commander to the genocidal perpetrator Alexander Lutsky, nom de guerre „Andriyenko”, trained in 1940 in Kraków, the capital of the GG, in the so‐called „Konovalec Officers' School”. Under strict German control, of course. From 1939, the Germans in GG pursued a clearly pro‐Ukrainian policy. Ukrainians were guaranteed self‐government, the use of the Ukrainian language in administration, and Ukrainian education. The Ukrainian police, Germ. Ukrainische Hilfspolizei (Eng. Ukrainian Auxiliary Police), in some regions also referred to as Germ. Schutzmannschaft (Eng. Protection Battalions), i.e. Schuma, began its operations. Ukrainians were also entrusted with prison service, employed in concentration camp crews, and employed in lower administration. Ukrainian political organizations operated openly, such as the Organization of Ukrainian Nationalists OUN, the Ukrainian Central Committee UCC, which became the Ukrainian representation towards the German authorities. They were allowed to take over Polish schools, reading rooms, and churches and organize them as Ukrainian. In 1940, the Ukr. Служба Безпеки (Eng. Security Service), i.e. SB OUN, was allowed to be established under the watchful care of the Germans, whose task was to track down political and ideological opponents of the OUN. SB OUN training was conducted, among others, in Zakopane, at the „Stamary” hotel. According to the hotel's contemporary website, „the training included the principles of sabotage, Gestapo interrogation methods, and killing methods”. All these undertakings were overseen by the Germ. Geheime Staatspolizei (Eng. Secret State Police), i.e. the Gestapo, which in Zakopane had its headquarters in the „Palace” villa, where Polish patriots were being murdered. The „graduates” of the „Konovalec Officers' School” and the SB OUN was later to lead and participate in genocidal attacks on the Polish community, i.e. «Genocidium Atrox».

The choice of Zakopane and Kraków as training places for future génocidaires was not accidental. At the same time, i.e. in 1939‐1940, the Germans and Russians were agreeing and specifying the details of the extermination of the Polish intelligentsia and leaders. This happened at four so‐called thematic conferences, when the German Gestapo, and the Rus. Народный Комиссариат Внутренних Дел (Eng. People's Commissariat of Internal Affairs), i.e. NKVD, two genocidal allied organizations, debated cooperation and ways of combating and exterminating Poles in the territories they occupied. The first took place on 27.11.1939 in Brest‐on‐the‐Bug; the second immediately afterwards in Przemyśl. The third was held on 20.02.1940 in Zakopane, in the villas „Pan Tadeusz” (Eng. „Sir Thaddeus”) and „Telimena”, the fourth in 03.1940 in Kraków. In the meantime, at the beginning of 02.1940, in Hermann Göring's hunting lodge in Rominty in the Romincka Forest, a meeting of two génocidaires, Heinrich Himmler and Lavrentiy Beria, took place, where the decision to exterminate Polish society and combat the Polish resistance movement was probably finalized. As a consequence, in 04.1940, almost simultaneously, the genocidal murders of Polish prisoners of war began in Russia, which went down in history as the «Katyn genocide», and in the German‐occupied GG, the Germ. Außerordentliche Befriedungsaktion (Eng. Extraordinary Pacification Action) began, i.e. «Aktion AB», which was part of the so‐called Germ. «Intelligenzaktion» (Eng. Operation Intelligentsia), aimed at exterminating Polish political and intellectual elites.

Three years later, German–Russian–Ukrainian cooperation resulted in the «Genocidium Atrox», also in his parish Rudnyky.

It was then that was murdered.

A Polish source states: „In the summer of 1943, the Ukrainian priest Seńczuk was murdered by Banderites from the SB OUN for hosting a Pole, a disabled man named Leo Zakrzewski, for a year (he did not know that Zakrzewski was an officer of the WP [i.e. the Polish Army] and the ZWZ [i.e. the clandestine Union of Armed Struggle, part of the nascent Polish ClandestineState])”.

Another source states that the aforementioned Zakrzewski was murdered on the same day, and his killer was a certain Yuri Seńczuk — which indicates a possible kinship — who served in the „Ukrainian police”, i.e. the Germ. Ukrainische Hilfspolizei.

On 12.10.2007, the génocidaire Roman Shukhevych was posthumously awarded the title of Hero of Ukraine. In several locations, monuments and commemorative plaques have been erected to this Lat. „hostis humani generis” — as well as to the génocidaire Alexander Lutsky — and schools and streets were named after them.

Lat. „O Tempora! O mores!”